Stop node if switched from local node to another option

[spylogsster]

Stop node if switched from local node to another option

Steps to Reproduce

1. Select local node in settings
2. Visit ipfs:// url
3. Check the node is launched
4. Select gateway in settings, close settings tab
5. Check the node is stopped

Actual result:

Local node stays launched

Expected result:

Local node is stopped

Reproduces how often:

Brave version (brave://version info)

Version/Channel Information:

• Can you reproduce this issue with the current release?
• Can you reproduce this issue with the beta channel?
• Can you reproduce this issue with the nightly channel?

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields?
• Does the issue resolve itself when disabling Brave Rewards?
• Is the issue reproducible on the latest version of Chrome?

Miscellaneous Information:

[stephendonner]

Verified PASSED using the inline testplan here on nightly build

Brave	1.24.35 Chromium: 90.0.4430.41 (Official Build) nightly (x86_64)
Revision	e9c92b1eaca8487e212f3f6bc081fdb6d4863759-refs/branch-heads/4430@{#723}
OS	macOS Version 11.2.3 (Build 20D91)

Steps:

1. Opened brave://settings and selected Local node from Method to resolve IPFS resources
2. Loaded brave://ipfs-internals
3. Verified the node is launched
4. Selected Gateway in brave://settings for Method to resolve IPFS resources
5. Verified the node was stopped

Verification passed on

Brave	1.24.66 Chromium: 90.0.4430.72 (Official Build) beta (64-bit)
Revision	b6172ef8d07ef486489a4b11b66b2eaeed50d132-refs/branch-heads/4430@{#1233}
OS	Ubuntu 18.04 LTS

Verified the above test plan

---

Verification passed on

Brave | 1.24.82 Chromium: 90.0.4430.93 (Official Build) (64-bit)
-- | --
Revision | 4df112c29cfe9a2c69b14195c0275faed4e997a7-refs/branch-heads/4430@{#1348}
OS | Windows 10 OS Version 2004 (Build 19041.928)

Verified the above test plan mentioned